Hong Kong
Stage 4 - Stage 5

# Applications to Real Life

## Interactive practice questions

A soft drink can has a height of $13$13 cm and a radius of $3$3 cm. Find $L$L, the length of the longest straw that can fit into the can (so that the straw is not bent and fits entirely inside the can).

Give your answer rounded down to the nearest cm, to ensure it fits inside the can.

Easy
2min

Two flag posts of height $13$13 m and $18$18 m are erected $21$21 m apart. Find $l$l, the length of the string (in metres) needed to join the tops of the two posts, correct to one decimal place.

Easy
2min

A suspension bridge is being built. The top of the concrete tower is $22.2$22.2 metres above the bridge and the connection point for the main cable is $57.4$57.4 metres from the tower.

Assume that the concrete tower and the bridge are perpendicular to each other.

Easy
4min

A ship is $27$27m away from the bottom of a cliff. A lighthouse is located at the top of the cliff. The ship's distance is $34$34m from the bottom of the lighthouse and $37$37m from the top of the lighthouse.

Medium
4min